Enhancing the competitive ability of crops - Ecological Management of Agricultural Weeds - page 274

Figure 6.1 Effects ofsafflower density on competition between safflower and Setaria viridis, 1991.(a) Effect of
safflower density on S.viridis biomass.(b) Height ofsafflower and S.viridis .(c) Percentage ofphotosynthetically active
radiation (PAR) reaching the top ofthe S.viridis on 3 July.(d) Safflower seed yield in relation to density,with and
without presence of S.viridis .(Drawn from data provided by R.E.Blackshaw - see Blackshaw,1993).